True or False: You should release the dolly brakes before disconnecting the dolly air and electric lines when uncoupling the rear trailer.

The statement is false because releasing the dolly brakes before disconnecting the dolly air and electric lines could create an unsafe situation. When uncoupling, it is important to ensure that the dolly and any connected trailers are secured and immobile before performing the disconnection. The dolly brakes should remain engaged to prevent any movement while you are working on the disconnection process. This is particularly crucial in order to avoid accidents or injury that may arise from an uncontrolled dolly movement.

The safety of conducting these tasks in a secure manner is paramount; hence, it's essential to prioritize brake engagement before disconnecting the lines.